/*
** $Id: lua.h,v 1.218.1.5 2008/08/06 13:30:12 roberto Exp $
** Lua - An Extensible Extension Language
** Lua.org, PUC-Rio, Brazil (http://www.lua.org)
** See Copyright Notice at the end of this file
*/


#ifndef lua_h
#define lua_h

#include <stdarg.h>
#include <stddef.h>


#include "luaconf.h"


#define LUA_VERSION "Lua 5.1"
#define LUA_RELEASE "Lua 5.1.4"
#define LUA_VERSION_NUM 501
#define LUA_COPYRIGHT   "Copyright (C) 1994-2011 Lua.org, PUC-Rio"
#define LUA_AUTHORS     "R. Ierusalimschy, L. H. de Figueiredo & W. Celes"


/* mark for precompiled code (`<esc>Lua') */
#define LUA_SIGNATURE   "\033Lua"

/* option for multiple returns in `lua_pcall' and `lua_call' */
#define LUA_MULTRET (-1)


/*
** pseudo-indices
*/
#define LUA_REGISTRYINDEX   (-10000)
#define LUA_ENVIRONINDEX    (-10001)
#define LUA_GLOBALSINDEX    (-10002)
#define lua_upvalueindex(i) (LUA_GLOBALSINDEX-(i))


/* thread status; 0 is OK */
#define LUA_YIELD   1
#define LUA_ERRRUN  2
#define LUA_ERRSYNTAX   3
#define LUA_ERRMEM  4
#define LUA_ERRERR  5


typedef struct lua_State lua_State;

typedef int (*lua_CFunction)(lua_State *L);


/*
** functions that read/write blocks when loading/dumping Lua chunks
*/
typedef const char *(*lua_Reader)(lua_State *L, void *ud, size_t *sz);

typedef int (*lua_Writer)(lua_State *L, const void *p, size_t sz, void *ud);


/*
** prototype for memory-allocation functions
*/
typedef void *(*lua_Alloc)(void *ud, void *ptr, size_t osize, size_t nsize);


/*
** basic types
*/
#define LUA_TNONE       (-1)

#define LUA_TNIL        0
#define LUA_TBOOLEAN        1
#define LUA_TROTABLE  2
#define LUA_TLIGHTFUNCTION  3
#define LUA_TLIGHTUSERDATA  4
#define LUA_TNUMBER     5
#define LUA_TSTRING     6
#define LUA_TTABLE      7
#define LUA_TFUNCTION       8
#define LUA_TUSERDATA       9
#define LUA_TTHREAD     10

/* minimum Lua stack available to a C function */
#define LUA_MINSTACK    20


/*
** generic extra include file
*/
#if defined(LUA_USER_H)
#include LUA_USER_H
#endif


/* type of numbers in Lua */
typedef LUA_NUMBER lua_Number;


/* type for integer functions */
typedef LUA_INTEGER lua_Integer;



/*
** state manipulation
*/
LUA_API lua_State *(lua_newstate)(lua_Alloc f, void *ud);
LUA_API void (lua_close)(lua_State *L);
LUA_API lua_State *(lua_newthread)(lua_State *L);

LUA_API lua_CFunction(lua_atpanic)(lua_State *L, lua_CFunction panicf);


/*
** basic stack manipulation
*/
LUA_API int (lua_gettop)(lua_State *L);
LUA_API void (lua_settop)(lua_State *L, int idx);
LUA_API void (lua_pushvalue)(lua_State *L, int idx);
LUA_API void (lua_remove)(lua_State *L, int idx);
LUA_API void (lua_insert)(lua_State *L, int idx);
LUA_API void (lua_replace)(lua_State *L, int idx);
LUA_API int (lua_checkstack)(lua_State *L, int sz);

LUA_API void (lua_xmove)(lua_State *from, lua_State *to, int n);


/*
** access functions (stack -> C)
*/

LUA_API int (lua_isnumber)(lua_State *L, int idx);
LUA_API int (lua_isstring)(lua_State *L, int idx);
LUA_API int (lua_iscfunction)(lua_State *L, int idx);
LUA_API int (lua_isuserdata)(lua_State *L, int idx);
LUA_API int (lua_type)(lua_State *L, int idx);
LUA_API const char     *(lua_typename)(lua_State *L, int tp);

LUA_API int (lua_equal)(lua_State *L, int idx1, int idx2);
LUA_API int (lua_rawequal)(lua_State *L, int idx1, int idx2);
LUA_API int (lua_lessthan)(lua_State *L, int idx1, int idx2);

LUA_API lua_Number(lua_tonumber)(lua_State *L, int idx);
LUA_API lua_Integer(lua_tointeger)(lua_State *L, int idx);
LUA_API int (lua_toboolean)(lua_State *L, int idx);
LUA_API const char     *(lua_tolstring)(lua_State *L, int idx, size_t *len);
LUA_API size_t (lua_objlen)(lua_State *L, int idx);
LUA_API lua_CFunction(lua_tocfunction)(lua_State *L, int idx);
LUA_API void           *(lua_touserdata)(lua_State *L, int idx);
LUA_API lua_State      *(lua_tothread)(lua_State *L, int idx);
LUA_API const void     *(lua_topointer)(lua_State *L, int idx);


/*
** push functions (C -> stack)
*/
LUA_API void (lua_pushnil)(lua_State *L);
LUA_API void (lua_pushnumber)(lua_State *L, lua_Number n);
LUA_API void (lua_pushinteger)(lua_State *L, lua_Integer n);
LUA_API void (lua_pushlstring)(lua_State *L, const char *s, size_t l);
LUA_API void (lua_pushrolstring)(lua_State *L, const char *s, size_t l);
LUA_API void (lua_pushstring)(lua_State *L, const char *s);
LUA_API const char *(lua_pushvfstring)(lua_State *L, const char *fmt,
                                       va_list argp);
LUA_API const char *(lua_pushfstring)(lua_State *L, const char *fmt, ...);
LUA_API void (lua_pushcclosure)(lua_State *L, lua_CFunction fn, int n);
LUA_API void (lua_pushboolean)(lua_State *L, int b);
LUA_API void (lua_pushlightuserdata)(lua_State *L, void *p);
LUA_API void (lua_pushlightfunction)(lua_State *L, void *p);
LUA_API void (lua_pushrotable)(lua_State *L, void *p);
LUA_API int (lua_pushthread)(lua_State *L);


/*
** get functions (Lua -> stack)
*/
LUA_API void (lua_gettable)(lua_State *L, int idx);
LUA_API void (lua_getfield)(lua_State *L, int idx, const char *k);
LUA_API void (lua_rawget)(lua_State *L, int idx);
LUA_API void (lua_rawgeti)(lua_State *L, int idx, int n);
LUA_API void (lua_createtable)(lua_State *L, int narr, int nrec);
LUA_API void *(lua_newuserdata)(lua_State *L, size_t sz);
LUA_API int (lua_getmetatable)(lua_State *L, int objindex);
LUA_API void (lua_getfenv)(lua_State *L, int idx);


/*
** set functions (stack -> Lua)
*/
LUA_API void (lua_settable)(lua_State *L, int idx);
LUA_API void (lua_setfield)(lua_State *L, int idx, const char *k);
LUA_API void (lua_rawset)(lua_State *L, int idx);
LUA_API void (lua_rawseti)(lua_State *L, int idx, int n);
LUA_API int (lua_setmetatable)(lua_State *L, int objindex);
LUA_API int (lua_setfenv)(lua_State *L, int idx);


/*
** `load' and `call' functions (load and run Lua code)
*/
LUA_API void (lua_call)(lua_State *L, int nargs, int nresults);
LUA_API int (lua_pcall)(lua_State *L, int nargs, int nresults, int errfunc);
LUA_API int (lua_cpcall)(lua_State *L, lua_CFunction func, void *ud);
LUA_API int (lua_load)(lua_State *L, lua_Reader reader, void *dt,
                       const char *chunkname);

LUA_API int (lua_dump)(lua_State *L, lua_Writer writer, void *data);


/*
** coroutine functions
*/
LUA_API int (lua_yield)(lua_State *L, int nresults);
LUA_API int (lua_resume)(lua_State *L, int narg);
LUA_API int (lua_status)(lua_State *L);

/*
** garbage-collection function and options
*/

#define LUA_GCSTOP      0
#define LUA_GCRESTART       1
#define LUA_GCCOLLECT       2
#define LUA_GCCOUNT     3
#define LUA_GCCOUNTB        4
#define LUA_GCSTEP      5
#define LUA_GCSETPAUSE      6
#define LUA_GCSETSTEPMUL    7
#define LUA_GCSETMEMLIMIT   8
#define LUA_GCGETMEMLIMIT   9

LUA_API int (lua_gc)(lua_State *L, int what, int data);


/*
** miscellaneous functions
*/

LUA_API int (lua_error)(lua_State *L);

LUA_API int (lua_next)(lua_State *L, int idx);

LUA_API void (lua_concat)(lua_State *L, int n);

LUA_API lua_Alloc(lua_getallocf)(lua_State *L, void **ud);
LUA_API void lua_setallocf(lua_State *L, lua_Alloc f, void *ud);



/*
** ===============================================================
** some useful macros
** ===============================================================
*/

#define lua_pop(L,n)        lua_settop(L, -(n)-1)

#define lua_newtable(L)     lua_createtable(L, 0, 0)

#define lua_register(L,n,f) (lua_pushcfunction(L, (f)), lua_setglobal(L, (n)))

#define lua_pushcfunction(L,f)  lua_pushcclosure(L, (f), 0)

#define lua_strlen(L,i)     lua_objlen(L, (i))

#define lua_isfunction(L,n) (lua_type(L, (n)) == LUA_TFUNCTION)
#define lua_islightfunction(L,n) (lua_type(L, (n)) == LUA_TLIGHTFUNCTION)
#define lua_istable(L,n)    (lua_type(L, (n)) == LUA_TTABLE)
#define lua_isrotable(L,n)  (lua_type(L, (n)) == LUA_TROTABLE)
#define lua_islightuserdata(L,n)    (lua_type(L, (n)) == LUA_TLIGHTUSERDATA)
#define lua_isnil(L,n)      (lua_type(L, (n)) == LUA_TNIL)
#define lua_isboolean(L,n)  (lua_type(L, (n)) == LUA_TBOOLEAN)
#define lua_isthread(L,n)   (lua_type(L, (n)) == LUA_TTHREAD)
#define lua_isnone(L,n)     (lua_type(L, (n)) == LUA_TNONE)
#define lua_isnoneornil(L, n)   (lua_type(L, (n)) <= 0)

#define lua_pushliteral(L, s)   \
    lua_pushlstring(L, "" s, (sizeof(s)/sizeof(char))-1)

#define lua_setglobal(L,s)  lua_setfield(L, LUA_GLOBALSINDEX, (s))
#define lua_getglobal(L,s)  lua_getfield(L, LUA_GLOBALSINDEX, (s))

#define lua_tostring(L,i)   lua_tolstring(L, (i), NULL)



/*
** compatibility macros and functions
*/

// BogdanM: modified for eLua interrupt support
//#define lua_open()    luaL_newstate()
lua_State *lua_open(void);
lua_State *lua_getstate(void);

#define lua_getregistry(L)  lua_pushvalue(L, LUA_REGISTRYINDEX)

#define lua_getgccount(L)   lua_gc(L, LUA_GCCOUNT, 0)

#define lua_Chunkreader     lua_Reader
#define lua_Chunkwriter     lua_Writer


/* hack */
LUA_API void lua_setlevel(lua_State *from, lua_State *to);


/*
** {======================================================================
** Debug API
** =======================================================================
*/


/*
** Event codes
*/
#define LUA_HOOKCALL    0
#define LUA_HOOKRET 1
#define LUA_HOOKLINE    2
#define LUA_HOOKCOUNT   3
#define LUA_HOOKTAILRET 4


/*
** Event masks
*/
#define LUA_MASKCALL    (1 << LUA_HOOKCALL)
#define LUA_MASKRET (1 << LUA_HOOKRET)
#define LUA_MASKLINE    (1 << LUA_HOOKLINE)
#define LUA_MASKCOUNT   (1 << LUA_HOOKCOUNT)

typedef struct lua_Debug lua_Debug;  /* activation record */


/* Functions to be called by the debuger in specific events */
typedef void (*lua_Hook)(lua_State *L, lua_Debug *ar);


LUA_API int lua_getstack(lua_State *L, int level, lua_Debug *ar);
LUA_API int lua_getinfo(lua_State *L, const char *what, lua_Debug *ar);
LUA_API const char *lua_getlocal(lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_setlocal(lua_State *L, const lua_Debug *ar, int n);
LUA_API const char *lua_getupvalue(lua_State *L, int funcindex, int n);
LUA_API const char *lua_setupvalue(lua_State *L, int funcindex, int n);

LUA_API int lua_sethook(lua_State *L, lua_Hook func, int mask, int count);
LUA_API lua_Hook lua_gethook(lua_State *L);
LUA_API int lua_gethookmask(lua_State *L);
LUA_API int lua_gethookcount(lua_State *L);


struct lua_Debug
{
    int event;
    const char *name; /* (n) */
    const char *namewhat; /* (n) `global', `local', `field', `method' */
    const char *what; /* (S) `Lua', `C', `main', `tail' */
    const char *source;   /* (S) */
    int currentline;  /* (l) */
    int nups;     /* (u) number of upvalues */
    int linedefined;  /* (S) */
    int lastlinedefined;  /* (S) */
    char short_src[LUA_IDSIZE]; /* (S) */
    /* private part */
    int i_ci;  /* active function */
};

/* }====================================================================== */


/******************************************************************************
* Copyright (C) 1994-2008 Lua.org, PUC-Rio.  All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
******************************************************************************/


#endif
